SEGJ Technical Conference

ACROSS signal analysis from Toki, Morimachi and Toyohashi sources using continuous seismic records observed at Horai seismic array

Abstract We have been studying the long-term continuous monitoring of seismological processes occuring along and around subducting plate boundary in the Tokai region using ACROSS, an Accurately Controlled and Routinely Operated Signal System. In this study, we used the continuous seismic record observed at Horai seismic array and evaluated the signal from three ACROSS sources located at Toki, Morimachi and Toyohashi. The spectral analysis of the stacked signal and the semblance analysis of the transfer functions proved that the signal from each source was extracted and separated without mixture although the sources were operated simultaneously and continuously. The accrate source control enabled the frequency comb technique which is unique to the ACROSS.